Zip the file in a loop in ksh 88

Shell Programming and Scripting
1

Hi Team,

Version : Ksh 88

The Requirement is to zip every file in a folder(which is in for loop) and move the zipped file to another folder
I tried like the below , but didn't observe any change ( Infact more size ) after the file is zipped .

#!/bin/ksh
 
src_dir=/home/etc/Src_dat
dest_dir=/home/etc/zipped_dat
for test_file in `ls $src_dir`
 do
   cd $src_dir
   zip "$test_file.zip" "$test_file"
    mv $src_dir/$test_file.zip $dest_dir
done

With the code like above , I observe that
In the source folder the size of the file was 158 Data_day1.txt
In the destination folder the size of the file is 273 Data_day1.txt
Please advice where is the wrong in the above code !!!

Thank You

2

Might be due to headers

3

Thank You for the reply Rakesh,

I'm sorry , I didn't understand about headers

Thanks

4

Please check Zip (file format) - Wikipedia, the free encyclopedia

5

Thank You for the information Rakesh,

Can you please suggest me any change in the script so that it zip the every file correctly .
Or Is this fine ..

Thanks,

6

if you want to see the size difference with Zip, please try with a bigger file like say 1MB.

Before Zip

rakesh@xyz:/tmp/zlinux> du cics_log_01-09-12-22\:56\:00.tar.gz
4       cics_log_01-09-12-22:56:00.tar.gz

After zip , its size is increased due to zip headers

rakesh@xyz:/tmp/zlinux> ls -l cics_log_01-09-12-22\:56\:00.tar.gz*
-rw-r--r-- 1 rakesh users  45 2013-09-10 06:13 cics_log_01-09-12-22:56:00.tar.gz
-rw-r--r-- 1 rakesh users 239 2013-09-10 06:14 cics_log_01-09-12-22:56:00.tar.gz.zip

---------- Post updated at 06:21 AM ---------- Previous update was at 06:20 AM ----------

your method is correct and you can go ahead, but you can test it with unzip just to make sure its doesn't loose integrity